# Button Merchant Library

### Version 1.6.1

## Overview
The Button Merchant Library is designed for Android developers to integrate Button's functionality into their applications.

### Package
- [ButtonMerchantLibrary](https://building.usebutton.com/button-merchant-android/latest/index.html)
- Package: [com.usebutton.merchant](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/index.html)

### Classes
- [ActivityReportingTask](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-activity-reporting-task/index.html)
- [ButtonMerchant](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-merchant/index.html)
- [AttributionTokenListener](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-merchant/-attribution-token-listener/index.html)
- [ButtonProduct](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-product/index.html)
- [ButtonProductCompatible](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-product-compatible/index.html)
- [Order](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/index.html)
  - [Builder](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/-builder/index.html)
  - [Customer](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/-customer/index.html)
  - [LineItem](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/-line-item/index.html)
- [OrderListener](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order-listener/index.html)
- [PostInstallIntentListener](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-post-install-intent-listener/index.html)
- [UserActivityListener](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-user-activity-listener/index.html)

### Exceptions
- [ApplicationIdNotFoundException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-application-id-not-found-exception/index.html)
- [ButtonNetworkException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-button-network-exception/index.html)
- [HttpStatusException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-http-status-exception/index.html)
- [NetworkNotFoundException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-network-not-found-exception/index.html)

### Module
- [ButtonUserActivity](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.module/-button-user-activity/index.html)
- [Features](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.module/-features/index.html)

### Method
#### setEmail
- **Function Signature**: open fun [setEmail](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/-customer/-builder/set-email.html)(email: [String](https://developer.android.com/reference/kotlin/java/lang/String.html)): [Order.Customer.Builder](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/-customer/-builder/index.html)

*Description*: The SHA-256 hash of the transacting customer’s lowercase email, as a 64-character hex string. Note: The value of the e-mail address must be converted to lowercase before computing the hash. The hash itself may use uppercase or lowercase hex characters.